, lieutenant paul vance. lieutenant, thank you so much for finding time for us. you said something yesterday that you thought the search of the various crime scenes had been successful, and you might have found something that would help us understand the why and the how of this. what can you tell us about that? >> well, i can tell you, certainly, the major crime detectives of the state police have been working continuously since this tragedy unfolded, searching not only the initial crime scene at the school, but a secondary crime scene that we also discovered during the investigation. investigators have executed a number of search warrants and many, many different locations, and i can't detail what's been recovered, but i can tell you that a significant amount of evidence has been recovered and is being cataloged and processed that will certainly assist us in this investigation. >> schieffer: well, do you have any better idea today, even if you can't tell us of the details why, of why this person did this? >> i don't know that we can answer that question just yet. there's an immense amount o
